| Abbreviation | Definition |
|---|---|
| TETRA | Trans-European Trunked RAadio |
| TFC | Traffic |
| TJZ | Cameroon Radio |
| TL | Telecommunication License |
| TM+TN | Two Meter Plus Traffic Network |
| TNC | Terminal-Node Computer |
| TON | Time Of Net |
| TPO | Transmitter Power Output |
| TRF | Tuned Radio Frequency |
| TRFR | Tuned Radio Frequency Receiver |
| TRS | Trunked Radio System |
| TSCB | TruckSpec Citizens Band antenna |
| TTFN | Ta Ta For Now |
| TTYL | Talk To You Later |
| TVLP | Low-Profile TeleVision antenna |
| TWOMETER/PLUS | JACKSON COUNTY MICHIGAN 'TWO-METER' RADIO CLUB, |
| TXC | Transmitter Crystal |
| TXMMO | Texas Mobile Multiple Operator |
| TXMSO | Texas Mobile Single Operator |
| TXO | Transmit Crossover |